Nissan Murano: Door & Lock :: Dtc/circuit Diagnosis / B2409 Half Latch Sw

Nissan Murano (Z52) 2015-2024 Service Manual / Body Exterior, Doors, Roof & Vehicle Security / Door & Lock :: Dtc/circuit Diagnosis / B2409 Half Latch Sw

DTC Description

DTC DETECTION LOGIC

DTC No.

CONSULT screen items

(Trouble diagnosis content) 		DTC detecting condition
B2409–71

HALF LATCH SW

(Half latch switch) 		Diagnosis condition All times
Signal (terminal) Half latch switch signal (automatic back door control module connector terminal: 7)
Threshold

When all of the following conditions are satisfied

  • Back door: half latch or open

  • Half latch switch: ON → OFF
Diagnosis delay time –

POSSIBLE CAUSE

  • Entry of foreign materials to back door lock assembly

  • Back door mechanism

  • Half latch switch

  • Harness or connectors (half latch switch circuit is open or shorted)

  • Automatic back door control module

FAIL-SAFE

Inhibit automatic back door system auto open/close function

DTC Confirmation Procedure

PERFORM DTC CONFIRMATION PROCEDURE

CONSULT

  1. Ignition switch ON.

  2. Open the back door.

  3. Select “Self Diagnostic Result” mode of “AUTO BACK DOOR”.

Is DTC detected?

YES>>

Refer to DTC Diagnosis Procedure.

NO>>

To check malfunction symptom before repair: Refer to Intermittent Incident.

NO>>

Confirmation after repair: Inspection End.

Diagnosis Procedure

CHECK FOR FOREIGN MATERIALS IN BACK DOOR LOCK ASSEMBLY

Check for entry of foreign materials in back door lock assembly.

Is the inspection result normal?

YES>>

GO TO 3.

NO>>

GO TO 2.

REMOVE FOREIGN MATERIALS AND ERASE DTC

CONSULT

  1. Remove foreign materials.

  2. Ignition switch ON.

  3. Select “Self Diagnostic Result” mode of “AUTO BACK DOOR”.

  4. Erase DTC, and then repeat “DTC CONFIRMATION PROCEDURE”. Refer to DTC Confirmation Procedure.

Is DTC “B2409-71” detected?

YES>>

GO TO 3.

NO>>

Inspection End.

CHECK BACK DOOR LOCK OPEN/CLOSE OPERATION

Manually check open and close operation of back door lock.

Is the inspection result normal?

YES>>

GO TO 7.

NO>>

GO TO 4.

CHECK INSTALLATION OF BACK DOOR LOCK ASSEMBLY

Check that back door lock assembly is installed normally. Refer to Removal and Installation.

Is the inspection result normal?

YES>>

GO TO 6.

NO>>

GO TO 5.

ADJUST OF BACK DOOR LOCK ASSEMBLY INSTALLATION AND ERASE DTC

CONSULT

  1. Ignition switch OFF.

  2. Adjust of back door lock assembly installation.

  3. Ignition switch ON.

  4. Select “Self Diagnostic Result” mode of “AUTO BACK DOOR”.

  5. Erase DTC, and then repeat “DTC CONFIRMATION PROCEDURE”. Refer to DTC Confirmation Procedure.

Is DTC “B2409-71” detected?

YES>>

GO TO 6.

NO>>

Inspection End.

REPLACE BACK DOOR LOCK ASSEMBLY AND ERASE DTC

CONSULT

  1. Ignition switch OFF.

  2. Replace back door lock assembly. Refer to Removal and Installation.

  3. Ignition switch ON.

  4. Select “Self Diagnostic Result” mode of “AUTO BACK DOOR”.

  5. Erase DTC, and then repeat “DTC CONFIRMATION PROCEDURE”. Refer to DTC Confirmation Procedure.

Is DTC “B2409-71” detected?

YES>>

Replace automatic back door control module. Refer to Removal and Installation.

NO>>

Inspection End.

CHECK HALF LATCH SWITCH MONITOR ITEM

CONSULT

  1. Select “HALF LATCH SW” in “Data Monitor” mode of “AUTO BACK DOOR”.

  2. Check that the function operates normally according to the following conditions:

Monitor item Condition Status
HALF LATCH SW Back door Open/fully closed OFF
Half latch ON

Is the inspection result normal?

YES>>

GO TO 12.

NO>>

GO TO 8.

CHECK HALF LATCH SWITCH INPUT SIGNAL

  1. Ignition switch OFF.

  2. Disconnect back door lock assembly connector.

  3. Check voltage between back door lock assembly harness connector and ground.

    (+) (–)

    Voltage

    (Approx.)
    Back door lock assembly
    Connector Terminal
    D557 6 Ground Battery voltage

Is the inspection result normal?

YES>>

GO TO 10.

NO>>

GO TO 9.

CHECK HALF LATCH SWITCH CIRCUIT

  1. Disconnect automatic back door control module connector.

  2. Check continuity between automatic back door control module harness connector and back door lock assembly harness connector.

    Automatic back door control module Back door lock assembly Continuity
    Connector Terminal Connector Terminal
    B55 3 D557 6 Yes

  3. Check continuity between automatic back door control module harness connector and ground.

    Automatic back door control module Ground Continuity
    Connector Terminal
    B55 3 No

Is the inspection result normal?

YES>>

Replace automatic back door control module. Refer to Removal and Installation.

NO>>

Repair or replace harness.

CHECK HALF LATCH SWITCH GROUND CIRCUIT

  1. Disconnect back door lock assembly connector.

  2. Check continuity between back door lock assembly harness connector and ground.

    Back door lock assembly Ground Continuity
    Connector Terminal
    D557 8 Yes

Is the inspection result normal?

YES>>

GO TO 11.

NO>>

Repair or replace harness.

REPLACE BACK DOOR LOCK ASSEMBLY AND ERASE DTC

CONSULT

  1. Replace back door lock assembly. Refer to Removal and Installation.

  2. Ignition switch ON.

  3. Select “Self Diagnostic Result” mode of “AUTO BACK DOOR”.

  4. Erase DTC, and then repeat “DTC CONFIRMATION PROCEDURE”. Refer to DTC Confirmation Procedure.

Is DTC “B2409-71” detected?

YES>>

Replace automatic back door control module. Refer to Removal and Installation.

NO>>

Inspection End.

ERASE DTC

CONSULT

  1. Select “Self Diagnostic Result” mode of “AUTO BACK DOOR”.

  2. Erase DTC, and then repeat “DTC CONFIRMATION PROCEDURE”. Refer to DTC Confirmation Procedure.

Is DTC “B2409-71” detected?

YES>>

GO TO 13.

NO>>

Check intermittent incident. Refer to Intermittent Incident.

REPLACE BACK DOOR LOCK ASSEMBLY AND ERASE DTC

CONSULT

  1. Ignition switch OFF.

  2. Replace back door lock assembly. Refer to Removal and Installation.

  3. Ignition switch ON.

  4. Select “Self Diagnostic Result” mode of “AUTO BACK DOOR”.

  5. Erase DTC, and then repeat “DTC CONFIRMATION PROCEDURE”. Refer to DTC Confirmation Procedure.

Is DTC “B2409-71” detected?

YES>>

Replace automatic back door control module. Refer to Removal and Installation.

NO>>

Inspection End.

    B2401 Ign Open

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    B2416 Touch Sen R Open

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